Definition of ZEB and future measures proposed by the ZEB Roadmap Examination Committee

Transcription

1 Definition of ZEB and future measures proposed by the ZEB Roadmap Examination Committee December, 2015 Energy Efficiency and Conservation Division Agency for Natural Resources and Energy Ministry of Economy, Trade and Industry 0

2 1.Status quo of energy in Japan 2.Definition of the ZEB (net zero energy building) and future measures proposed by the ZEB Roadmap Examination Committee (1) Introduction (2) Definition and evaluation methods of ZEBs (3) Feasibility of ZEBs (4) Promotion methods of ZEBs

3 1.Status quo of energy in Japan(Status of energy consumption) Although Japanʼs GDP has increased 2.5-fold since the oil crisis, energy consumption by the industrial sector has dropped by nearly 20%. On the other hand, energy consumption by the civilian sector has increased considerably (2.9-fold for the commercial sector, 2.0-fold for the residential sector). To stabilize the energy demand and supply in Japan, it is essential to take measures to reduce energy consumption in the civilian sector. Million kl in crude oil equivalent Real GDP 1973 >2013 increased by 2.5 times Transport sector Commercial sector Residential sector (Unit: trillion yen, price in 2005) 22.5% (82 million kl) 20.6% (76 million kl) 14.0% (51 million kl) Final energy consumption 1.3 fold 1.8 fold 2.9 fold Industrial sector 43.0% (158 million kl) 2.0 fold 0.8 fold (Note) As for the final energy consumption by sector, the values estimated from sources such as the Input Output Table (the last version was published for the year 2005) and the System of National Accounts are used for the business and industrial sectors (non manufacturing industry, food manufacturing industry, small and medium manufacturing industry in other fields). Due to technical factors of the statistics, the short term decrease in consumption after the Great Eastern Japan Earthquake in the commercial sector has not been sufficiently taken into consideration. [Sources] Comprehensive Energy Statistics, Annual Report on National Accounts, EDMC Handbook of Japan's & World Energy & Economic Statistics 2

4 1.Status quo of energy in Japan(Japanʼs efforts for energy savings since the oil crisis) Thanks to strenuous efforts by both public and private sectors since the 1970s oil crisis, Japan has improved its energy efficiency by around 40% from 1973 to 2013, which is one of the highest energy efficiencies in the world. However, more measures are necessary because the efficiency per GDP has been stagnant since the latter half of the 1980s. Evolution of energy efficiency in Japan (volume of energy supply/real GDP) Crude oil equivalent million kl/trillion yen (Unit: trillion yen, price in 2005) Comparison among countries in energy efficiency (2011) Real GDP Improved by around 40% Energy efficiency (volume of energy supply/real GDP) (Sources) Comprehensive Energy Statistics, Annual Report on National Accounts Japan United Kingdom Australia Germany France Sources) IEA Energy Balance of OECD Countries 2014 Edition, IEA Energy Balance of Non OECD Countries 2014 Edition, EDMC Handbook of Japan's & World Energy & Economic Statistics (Note) For the conversion, the value of the primary energy supply (oil equivalent ton)/real GDP for Japan is set to 1. United States Canada South Korea Middle East Indonesia Non OECD countries China Thailand Russia India World 3

5 1.Status quo of energy in Japan(Situation of energy consumption in the commercial sector, part 1) As for the commercial sector where energy consumption has considerably increased, energy consumption per square meter has been leveling off or even improved in recent years. Although the floor area has been consistently on the rise, energy consumption has been declining in recent years. Evolution of energy consumption and floor area in the commercial sector 3 Floor area Floor area Volume of energy consumption Volume of energy consumption Energy consumption/floor area 0.7 Energy consumption/floor area (The vertical line showing the indices using the value for 1973 is taken as 1.) (The vertical line showing the indices using the value for 1990 is taken as 1.) (Sources) Prepared on the basis of the Handbook of Japan's & World Energy & Economic Statistics issued by the Institute of Energy Economics, Japan

6 1.Status quo of energy in Japan (Situation of energy consumption in the commercial sector, part 2) If the commercial sector is roughly divided into nine subsectors, it is clear that the todayʼs energy consumption by offices and buildings and wholesalers and retailers has become more important, but in the past hotels and inns and offices and buildings were largely responsible for energy consumption. The ratio of energy consumption per piece of equipment in the entire building largely depends on the building usage. Evolution of energy consumption by subsector of the commercial sector For hospitals, focusing on savings in the hot water supply and air conditioning equipment, which are the largest consumers of energy, would be most efficient. Ratio of energy consumption per piece of equipment in the entire building For offices, focusing on energy conservation of air conditioning and lighting equipment, which are the largest consumers of energy, would be most efficient. Offices and buildings for FY 1973 Hotels and inns for FY 1973 Other services Restaurants and bars Wholesalers and retailers Hospitals Others 14 Lighting and power outlets 14 air conditioning equipment 30 Lighting and power outlets 33 Schools Theaters and recreation facilities Hotels and inns Department stores Offices and buildings hot water supply 42 air conditioning equipment 50 Fiscal year (Note) In the Comprehensive Energy Statistics, the methods to calculate the values were modified from FY (Sources) Estimation based on the Handbook of Japan's & World Energy & Economic Statistics issued by the Institute of Energy Economics, Japan and Comprehensive Energy Statistics by the Agency for Natural Resources and Energy Hospitals Hotels Stores Offices (Reference) Workshop Report on the Realization and Development of the ZEB (Net Zero Energy Building) (Ministry of Economy, Trade and Industry, November 2009) 5

7 1.Status quo of energy in Japan 2.Definition of the ZEB (net zero energy building) and future measures proposed by the ZEB Roadmap Examination Committee (1) Introduction (2) Definition and evaluation methods of ZEBs (3) Feasibility of ZEBs (4) Promotion methods of ZEBs

8 2.(1) Introduction (What is a ZEB (Net Zero Energy Building)?) A ZEB is a building with considerably reduced annual energy consumption by saving as much energy as possible via better heat insulation, solar shading, natural energy and high-efficiency equipment as well as creating energy (e.g., with photovoltaic power generation), while maintaining comfortable environments. Considerable reduction in the annual energy consumption by building Reduce energy demand and use resources more efficiently Creation of energy Reduction Ventilation Lighting Hot water supply Elevators Airconditioning Airconditioning Ventilation Lighting Hot water supply Elevators + 7

9 2.(1)Introduction (Goal of the ZEB and establishment of the ZEB Roadmap Examination Committee) The ZEB (Net Zero Energy Building) is receiving a lot of attention because it can minimize indoor energy consumption (e.g., in offices, schools, hospitals, hotels, etc.) and allow buildings to function independently in terms of energy during a disaster. Japanʼs Strategic Energy Plan (adopted at the Cabinet Council in April 2014) establishes the following goals to realize and promote of ZEBs: Realize ZEBs in newly constructed public buildings by 2020 Realize ZEBs in average newly constructed public and private buildings by 2030 To achieve the above goals, the ZEB Roadmap Examination Committee, which is composed of scholars, experts, and professionals from developers, architects, and general contractors, has been established to examine (1) the definition and evaluation method of ZEBs, (2) the feasibility, and (3) measures to promote ZEBs. 8

10 1.Status quo of energy in Japan 2.Definition of the ZEB (net zero energy building) and future measures proposed by the ZEB Roadmap Examination Committee (1) Introduction (2) Definition and evaluation methods of ZEBs (3) Feasibility of ZEBs (4) Promotion methods of ZEBs

11 2.(2) Definition and evaluation methods of ZEBs (Challenges) While a few advanced companies promote ZEBs, it is difficult for consumers to compare and evaluate ZEBs as the definition differs by company. If an unrealistic definition or goal is adopted due to physical restrictions related to usage or scale, professionals in the industry may lose motivation. Questions to consider to evaluate ZEBs : Should ZEBs be evaluated at the design or management phase? Which equipment (cooling, heating, lighting, hot water supply, etc.) should be included in the evaluation? How should ZEBs be evaluated because it may be very difficult to realize a ZEB in a high-rise or large-scale building even if many solar panels are installed on the roof? 10

12 2.(2) Definition and evaluation methods of ZEBs (Energy-efficient buildings) In the design phase of a ZEB, it is important to achieve energy savings by upgrading the building envelope, which has long life and is difficult to renovate, while simultaneously improving the efficiency of the equipment and maximizing the architectural planning method (passive method). The ZEB standard (ZEB Ready) should be set so that it is at least 50% higher than the Energy Saving Standard. The above energy saving rate should be evaluated at the design phase. Requiring a minimal amount of energy Efficiently using energy Ordinary buildings ZEB Ready Improving heat insulation Solar shading High-efficiency air-conditioning High-efficiency ventilation High-efficiency lighting Airconditioning Ventilation 50% reduction Use of natural ventilation and daylight + High-efficiency hot water supply High-efficiency elevators Lighting Airconditioning Hot water supply Elevators Ventilation Lighting Hot water supply Elevators * The calculation method should be consistent with the Energy Saving Standard. However, the 50% higher energy saving rule applies to air conditioning, hot water supply, ventilation, lighting, and elevators. In addition, reduction due to renewable energy should not be taken into consideration. 11

13 2.(2) Definition and evaluation methods of ZEBs (Energy-creating buildings) The goal is to achieve net zero energy consumption by creating energy (e.g., via solar power) while fulfilling the higher than 50% energy saving (ZEB Ready). However, the evaluation method should take into account that high-rise and large-scale buildings have limited rooftop areas, and consequently, limited energy production capabilities. If energy savings of at least 75% is achieved the Nearly ZEB status is granted. If energy savings of 100% or more is achieved, the ZEB status is granted. * The method to determine 100% or 75% energy savings should follow the Energy Saving Standard. This rule should apply to air conditioning, hot water supply, ventilation, lighting, and elevators. In addition, the production of renewable energy on site (inside the premises), including the part of electricity sold (only the surplus power sold), should be taken into account. ZEB Ready (Energy saving of 50% or more) Nearly ZEB ZEB (Net energy saving of 75% or more) (Net energy saving of 100% or more) 50% reduction Airconditioning Ventilation Lighting Hot water supply Elevators 12

14 2.(2) Definition and evaluation methods of ZEBs (Image of ZEB definition) Volume of energy supply Energy independence 4 Introduction of renewable energy ZEB Nearly ZEB Reduction of 100% or more (Net Zero) Reduction of 75% or more Energy savings 1 Load reduction (improving heat insulation and solar shading, etc.) 2 Use of natural energy 3 Equipment and systems with improved efficiency of the equipment ZEB Ready Reduction of 50% or more Reduction of 50% or more Benchmark primary energy consumption Volume of energy consumption Reference Building 13

15 1.Status quo of energy in Japan 2.Definition of the ZEB (net zero energy building) and future measures proposed by the ZEB Roadmap Examination Committee (1) Introduction (2) Definition and evaluation methods of ZEBs (3) Feasibility of ZEBs (4) Promotion methods of ZEBs

16 2.(3) Feasibility of ZEBs (Challenges) Because buildings are not mass-produced goods, the design method has yet to be sufficiently established and shared. Additionally, the economic feasibility of ZEB construction has yet to be evaluated. How can ZEBs be constructed? What kinds of architectural planning should be prepared? How much heat insulation material is necessary for walls and ceilings? What kinds of equipment should be introduced? What are the costs associated with ZEB designs? 15

17 2.(3) Feasibility of ZEBs (Example of a calculation for a 10,000 m 2 office building (7-story building) A case study was conducted to examine what kinds of technologies and equipment should be introduced to build a ZEB and to determine the cost increase relative to ordinary buildings. It has been estimated that a 50% energy savings (ZEB Ready) can be achieved in offices, schools, and hotels by adequately selecting currently available high-performance building materials and equipment. * We estimate that the additional costs for materials and equipment will be approximately 5% of the entire construction cost (a detailed survey is necessary to estimate the additional costs due to changes in architectural planning and structure). Envelope Airconditioning Ventilation Lighting Hot water supply Elevator (Pattern A) Equivalent to the 2013 Energy Saving Standard Single layer 8 mm, etc. Roof insulation with 50 mm extruded polystyrene foam Wall insulation with 25 mm extruded polystyrene foam Air cooled heat pump, EHP (electric heat pump) Secondary pump that controls a number of units and the revolving speed Constant air volume control etc. Static pressure: 250 Pa Fan efficiency: 40% Without control etc. HF type appliances Without control etc. Localized electric hot water storage system Without a hot water saving device With 30 mm piping heat insulation AVAF (Adjustable Voltage Adjustable Frequency) (without electric power regeneration) Simulation of the conditions in the latest buildings (Pattern B) Equivalent to the Energy Saving Standard (glass architecture) Low-E Double Glazing, full height, with horizontal eaves Roof insulation with 50-mm extruded polystyrene foam Wall insulation with 25-mm extruded polystyrene foam Air-cooled heat pump, EHP (electric heat pump) Secondary pump that controls a number of units and the revolving speed VAV (variable air volume) control, etc. Static pressure: 250 Pa Fan efficiency: 40% Without control etc. HF type appliances Without control etc. Localized electric hot water storage system Without a hot water saving device With 30 mm piping heat insulation AVAF (Adjustable Voltage Adjustable Frequency) (without electric power regeneration) Specifications fulfilling the ZEB Ready conditions have been examined. (Pattern C) Equivalent to ZEB Ready Low-E Double Glazing, full height, with horizontal eaves Roof insulation with 50-mm extruded polystyrene foam Wall insulation with 25-mm extruded polystyrene foam Air-cooled heat pump (controlling number of compressors), EHP Small-flow pump that controls a number of units and the revolving speed VAV control, outdoor air cooling, double fan, etc. Static pressure: 250 Pa Fan efficiency: 40% High efficiency motor, temperature control, etc. LED lighting Human sensor, daylight dimming control, etc. Localized electric hot water storage system Automatic hot water supplying tap With 30 mm piping heat insulation AVAF (Adjustable Voltage Adjustable Frequency) * Please note that in the table above, the technology for the use of natural energy is not evaluated. A more diverse combination of technology than described above may already exist to realize ZEB Ready. 16

18 2.(3) Feasibility of ZEBs (Example of a calculation for a 10,000 m 2 office building (7-story building) Reduction 一次エネルギー消費削減量 volume of primary [MJ/( 年 m2 energy )] consumption [MJ/ (year/m 2 )] 1,800 1,600 1,400 1,200 1, (As compared with Case ( 対 Case A) Reduction A) (As ( 対 compared Case with B) 削減比率 of 52% 52% Case 削減比率 B) Reduction 50% of 50% Case A: 平成 A: Equivalent 25 年基準相当 to the Case B: 平成 B: Equivalent 25 年基準相当 to the C:ZEB Case C: Ready ZEB Ready ケース 2013 Standard 2013 Standard(Glass architecture ( ガラス建築化 adopted) ) Power コンセント等 outlet 昇降機 Elevator Hot 給湯 water supply Lighting 照明 Ventilation 換気 Air conditioning 空調 Examined cases Case B: Equivalent to the 2013 Standard Case A: Equivalent to the 2013 Standard Case C:ZEB Ready (Glass architecture adopted) Primary energy Percentage Primary energy Percentage Primary energy Percentage Reduction rate [GJ/year] [MJ/ m 2 year] % [GJ/ year] [MJ/ m 2 year] % [GJ/year] [MJ/ m 2 year] % Compared with B Air conditioning 8, % 8, % 4, % 50% Ventilation % % % 46% Lighting 3, % 3, % 1, % 55% Hot water supply % % % 27% Elevator % % % 11% Others 3, , , Total 17,537 1,693 17,046 1,646 10, % Except 1,338 power outlets 1, % PAL

19 1.Status quo of energy in Japan 2.Definition of the ZEB (net zero energy building) and future measures proposed by the ZEB Roadmap Examination Committee (1) Introduction (2) Definition and evaluation methods of ZEBs (3) Feasibility of ZEBs (4) Promotion methods of ZEBs

20 2.(4) Promotion methods of ZEBs (Challenges) Has the know-how to design ZEBs been established and disseminated? -The techniques, methods, and cost for designing ZEBs are not transparent. Is ZEB recognized? What are the advantages of a ZEB building for tenants? (Improved building or corporate value, reduced electricity and heating expenses, better anti-disaster performance due to energy independence, higher comfort and intellectual productivity, etc.) What is the difference from similar indexes for buildings? (Certified low-carbon buildings, etc.) Is the cost of building ZEBs minimized? Currently, the additional investment to construct a ZEB might not be necessarily economically rational. Important gap: Although the investment for the ZEB must be borne by the owner of the building, the merits such as the reduction of electricity and heating expenses benefit the tenants, not the owner. For buildings for rent, the scale of investment may be limited based on the difference in basic rent. 19

21 2.(4) Promotion methods of ZEBs (The ZEB roadmap) Based on the discussions in the Examination Committee, these measures have are proposed for ZEBs. FY 2015 FY 2018 FY 2016 FY 2017 FY 2019 FY 2020 National government Private companies, businesses organization Establishment of the definition Design of the ZEB Preparation of guidelines Technology development Measures in newly constructed public buildings Public relations Training of engineers Goal setting Definition established Revise the definition (if necessary) Demonstration project Preparation of guidelines Technology development to reduce costs Implement active measures in newly constructed public buildings (including schools). Promote/brand ZEBs Train ZEB engineers Collect data, monitor progress, and report regularly based on the voluntary action plan Goals Realization and popularization of ZEBs Realize and autonomously popularize ZEBs 20

22 2.(4) Promotion methods of ZEBs (Draft of the ZEB Roadmap) <Measures that the national government should take in cooperation with businesses and private companies> Draft design guidelines through the ZEB demonstration project The techniques, methods, and costs for designing ZEBs should be clarified (ZEB designing guidelines). To execute the ZEB demonstration project, obtain feedback from those concerned through collection, analysis, and publication of real management data. Support technology development aimed at higher performance and lower costs Support technology development necessary to realize ZEBs. Implement active measures for newly-constructed public buildings (including schools). Promote and brand ZEBs Easy-to-understand PR activities (including comparisons with other indexes and the merits of ZEBs) should be conducted in cooperation with companies. 21

23 2.(4) Promotion methods of ZEBs (Reference: image of measures necessary for each usage) Measures to realize ZEBs are necessary in accordance with the area (ratio of building volume to lot), usage, and structure (stories). Building 建物用途 usage One to 3 階以下 three stories Offices 事務所 Schools 学校 Four to 10 階以下 ten stories More than 10 階超 ten stories Elementary, junior, or 小 中 高等学校 senior high schools Specialized training 専門学校 大学 colleges and universities Hotels ホテル Hospitals 病院 Ratio of building volume 容積率 to (%) lot (%) 50 以上 未満 100 以上 未満 300 以上 未満 500 以上 500 1,000 未満 1,000 or 以上 more Promotion ZEB by 定義の確立により普及促進 establishing the definition of ZEB * Design guidelines should be formulated for small and medium companies. 中小事業者に対しては設計ガイドラインの策定も必要 Promotion 設計ガイドラインの策定により by formulating design guidelines 普及促進 In addition to formulating design guidelines, technology development 設計ガイドラインの策定のほか技術開発も重要 is also important. Promotion ZEB by 定義の確立により普及促進 establishing the definition of ZEB Promotion by establishing the definition of ZEB ZEB 定義の確立により普及促進 Promotion by establishing the definition of ZEB ZEB 定義の確立により普及促進 Promotion by establishing the definition of ZEB ZEB 定義の確立により普及促進 設計ガイドラインの策定により Promotion by formulating design 普及促進 guidelines Promotion 設計ガイドラインの策定により by formulating design 普及促進 guidelines Promotion 設計ガイドラインの策定により by formulating design 普及促進 guidelines 設計ガイドラインの策定のほか技術開発も重要 In addition to formulating design guidelines, technology development is also important. Shops 物販店舗 Promotion by establishing the ZEB definition 定義の確立により普及促 of ZEB * 進 Design 中小事業者に対しては設 guidelines should be formulated for small and medium companies. 計ガイドラインの策定も必要 Promotion 設計ガイドラインの策定により by formulating design 普及促進 guidelines 22

24 2.(4) Promotion methods of ZEBs (Reference: comparisons with other indexes) The advantage of ZEBs must be explained while clearly showing the difference from other indexes. Energy specific type Comprehensive evaluation type Energy saving rate 20% 40% The 2013 Energy Saving Standard Equivalent to the 2013 Energy Saving Standard * Including renewable energy related to selfconsumption and home electric appliances BELS Certified lowcarbon building Equivalent to the certified lowcarbon building * Including renewable energy related to self-consumption and home electric appliances ZEB * Including renewable energy sold, but excluding home electric appliances ZEB Ready CASBEE Level 3 Level 4 LEED Evaluation criteria for the energy performance of NC (new construction) 1 point added for each two additional energy saving percentages 60% 80% 100% 5 * Including renewable energy related to selfconsumption and home electric appliances Nearly ZEB ZEB Level 5 CASBEE Evaluation criteria for buildings (newly constructed) LR out of 19 points 23

25 2.(4) Promotion methods of ZEBs (the ZEB Roadmap) <Measures that businesses and private companies should take in cooperation with the national government> Train engineers Train engineers capable of designing, calculating, diagnosing, and proposing ZEBs Set goals and monitor progress for ZEBs Developers, architects, general contractors, and equipment manufacturers should establish, publish, and monitor goals related to the popularization of ZEBs. Promote and brand ZEBs Easy-to-understand PR activities should be conducted on the basis of cooperation between businesses and the national government. 24

26 The Promotion Project for the Introduction of Innovative Energy Saving Technology for Houses and Office Buildings Amount of draft budget for FY2016: 11 billion yen (760 million yen) Project content 中 企業庁技術 経営 新課 Energy Conservation and Renewable Energy Department Agency for Natural Resources and Energy Housing Industry, Ceramics and Construction Materials Division Manufacturing Industries Bureau Tel: (Energy Conservation and Renewable Energy Department) 産業技術環境局 学連携推進室 Project image Project goal and summary Zero Energy House (ZEH) Support Project To achieve the goal of ensuring that more than half of newly-constructed houses are ZEHs (*) by 2020, the project supports introducing ZEHs using a combination of high-performance building materials, equipment, and storage cells to reduce the costs of building ZEHs and speed up their popularization Winter ZEH Summer Cool breeze Highly insulated window Solar shading High efficiency lighting equipment Use of solar heat High efficiency airconditioning equipment Energy saving ventilation equipment Discharge Zero Energy Building (ZEB) Demonstration Project To achieve the goal of the ZEB (*) by 2020 and to create guidelines, the project supports introducing necessary high-performance building materials and equipment as well as innovative activities that aim to realize top-level energy savings. * ZEH/ZEB (Net Zero Energy House/Building) Houses/buildings with a net zero annual primary energy consumption High efficiency hot water supply equipment Heat High insulation specification Advanced energy-saving buildings to achieve the ZEB status Objective By promoting the popularization of houses and buildings with high energy saving performances to reduce energy costs, the project aims to ensure that more than half of the newly-constructed houses will be ZEHs and that buildings will turn into ZEBs by Improvement of the envelope s performance Use of solar heat High efficiency lighting Use of daylight High efficiency air conditioning Reduction of the outside air load Conditions (targeted persons and acts, subsidy rates, etc.) Subsidies National government Private organizations, etc. Subsidies (fixed amount, from 1/3 to 2/3) Installer Use of river water Use of wastewater heat High efficiency heat source Use of geothermal heat Use of well water 25